With the recent macOS Mojave update, we have received several issues from users whose Mac computers weren't being tracked by Prey. This issue started appearing in the Sierra update, and repeated itself in High Sierra.

We have been working to solve this version of the issue with an in-client update, however those who continue to experience the issue can try the following steps to troubleshoot Prey:

Run the following command: id -g prey

Is the result 80? If it is, let us know in the comments and we'll contact you for further troubleshooting, if it isn't 80, go to step 3.

Run the following command:sudo /usr/local/lib/prey/current/bin/prey config hooks set_watcher

Why does this happen?

On macOS devices, Prey works under a secret user that handles all requests with the proper special rights. Most macOS updates tend to unset this user, thus disabling Prey.